Senior React Developer Contract Length: 3 months Rate: 500-550 p/d Inside IR35 Overview We are seeking a highly skilled engineer with deep expertise in React and Single Sign-On (SSO) implementations, particularly Okta. The successful candidate will combine strong front-end development skills with proven experience in authentication and identity management. Key Responsibilities Modernize and refactor an existing Fix UI application: Update outdated codebase to current React standards. Improve maintainability and performance. Implement multi-tenant architecture within the UI. Integrate the application with SSO solutions, ensuring flexibility to connect with: OAuth / OpenID Connect SAML Okta (primary client requirement). Deliver clean, scalable, and secure code aligned with best practices. Collaborate with internal teams to ensure smooth integration and deployment. Essential Skills & Experience Expert-level React development (hooks, state management, modern patterns). Strong background in SSO implementation and identity protocols. Hands-on experience with Okta integration. Knowledge of OAuth 2.0, OpenID Connect, and SAML. Experience building multi-tenant applications. Ability to refactor and modernize legacy codebases. Nice-to-Have Familiarity with other identity providers (Azure AD, Auth0, Ping Identity). Experience in secure coding practices and compliance frameworks. Strong problem-solving and communication skills.